/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controle;

import dao.Dao;
import entidades.Usuario;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author user
 */
@WebServlet(name = "LoginServlet", urlPatterns = {"/LoginServlet"})
public class LoginServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /*
             * TODO output your page here. You may use following sample code.
             */
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LoginServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LoginServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        } finally {            
            out.close();
        }
    }

    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String op = request.getParameter("op");
        if(op.equals("Sair")){
            HttpSession session = request.getSession();
            session.removeAttribute("usuario");
            session.invalidate();
            response.sendRedirect("index.jsp");
        }
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String login = request.getParameter("login");
        String senha = request.getParameter("senha");
        Dao<Usuario> daoU = new Dao<Usuario>(Usuario.class);
        List<Usuario> usuarios = daoU.listByLoginandSenha(login, senha);


        if (usuarios.size() > 0) {// tem um usuario com aquele login senha
            Usuario usuario = new Usuario();
            usuario = usuarios.get(0); //pega o usuario encontrado com aquele login e senha

            HttpSession session = request.getSession(true); //para outras ocasioes, HttpSession session = request.getSession();
            //session.setAttribute("usuario", usuario); //isso coloca dentro da sessao, 
            // para pagar o atributo => session.getAttribute("nomeDoAtributo");

            session.setAttribute("usuario", usuario);
            response.sendRedirect("gerenciarProduto.jsp");
            
        } else {
            response.sendRedirect("erroLogin.jsp");
        }
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
